Re: caps

• To: tesla-at-pupman-dot-com
• Subject: Re: caps
• From: "Mike Nolley" <nolleym-at-willamette.edu> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 28 May 2000 20:30:33 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

On Sat, 27 May 2000, Tesla List wrote:

> Original Poster: "Grayson B Dietrich" <electrofire-at-juno-dot-com> 
> 
> While I'm sure others will answer this as well, It is my understanding
> that  most electrolytic caps will burn out or worse (explode) if you run
> AC on them. Certainly they can not withstand the RF in a TC tank circuit!
> 
	Actually, since the supply voltage is DC and the application is
just filtration, not pulse discharge, I don't see the problem.  Photo
flash electrolytics would work fine, or really any electrolytics rated at
~400 volts.  10 400 uf, 400 volt caps would give me 40 uf--more than
enough for my purposes.  The trick would be to make sure RF didn't get
into the supply circuit.  But this is a cinch for DC; I'd just use some of
my diodes to make an L-diode filter, as Greg Leyh did for the Electrum
coil.  100% filtration is a pretty good figure. 
   Does anyone else see a reason why electrolytics wouldn't work as
filter caps?  Thanks again for the idea, Steve. 
		--Mike

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